:root {
  --bg-deep: #0a1626;
  --bg-panel: #10203a;
  --cyan: #38e1ff;
  --cyan-dim: #1f6d80;
  --orange: #ff7a29;
  --steel: #2a3f5f;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'Space Grotesk', sans-serif;
  color: #e2eefb;
  background:
    radial-gradient(circle at 20% 10%, rgba(56,225,255,0.08), transparent 45%),
    radial-gradient(circle at 85% 80%, rgba(255,122,41,0.07), transparent 45%),
    linear-gradient(160deg, #071019 0%, #0a1626 45%, #0d1b30 100%);
  background-attachment: fixed;
  min-height: 100vh;
}

.title-font { font-family: 'Orbitron', sans-serif; }
.body-font { font-family: 'Space Grotesk', sans-serif; }

.glow-text {
  text-shadow: 0 0 12px rgba(56,225,255,0.5), 0 0 30px rgba(56,225,255,0.25);
}

/* Header */
header {
  background: linear-gradient(180deg, #0c1c33 0%, #0a1626 100%);
  position: relative;
}
.header-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(56,225,255,0.09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56,225,255,0.09) 1px, transparent 1px);
  background-size: 34px 34px;
  mask-image: radial-gradient(circle at 50% 50%, black 40%, transparent 85%);
  -webkit-mask-image: radial-gradient(circle at 50% 50%, black 40%, transparent 85%);
}
.gear {
  position: absolute; font-size: 2.5rem; opacity: 0.35;
  animation: spin 9s linear infinite;
}
.gear-tl { top: 14px; left: 18px; }
.gear-tr { top: 20px; right: 22px; animation-direction: reverse; animation-duration: 12s; }
@keyframes spin { to { transform: rotate(360deg); } }

/* Panels */
.panel {
  background: linear-gradient(180deg, rgba(18,36,63,0.9), rgba(12,26,48,0.9));
  border: 2px solid var(--steel);
  box-shadow: 0 0 0 1px rgba(56,225,255,0.08), 0 8px 30px rgba(0,0,0,0.45);
  position: relative;
}
.panel::before, .panel::after {
  content: '';
  position: absolute;
  width: 8px; height: 8px;
  background: var(--cyan-dim);
  border-radius: 50%;
  box-shadow: inset 0 0 3px #000;
}
.panel::before { top: 8px; left: 8px; }
.panel::after { top: 8px; right: 8px; }

/* Dropzone */
.dropzone {
  border: 3px dashed var(--cyan-dim);
  background-image:
    linear-gradient(rgba(56,225,255,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56,225,255,0.05) 1px, transparent 1px);
  background-size: 22px 22px;
  transition: all 0.2s;
}
.dropzone:hover {
  border-color: var(--cyan);
  background-color: rgba(56,225,255,0.04);
}

/* Buttons */
.btn-primary {
  background: linear-gradient(135deg, var(--orange), #ff9d42);
  color: #1a0a00;
  border: none;
  letter-spacing: 1px;
  box-shadow: 0 4px 0 #b8500f, 0 0 18px rgba(255,122,41,0.4);
  transition: transform 0.1s, box-shadow 0.1s;
  cursor: pointer;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 0 #b8500f, 0 0 26px rgba(255,122,41,0.6); }
.btn-primary:active { transform: translateY(2px); box-shadow: 0 2px 0 #b8500f; }

.btn-accent {
  background: linear-gradient(135deg, var(--cyan), #14c9e6);
  color: #06212a; border: none; cursor: pointer;
  box-shadow: 0 3px 0 #0e7c8f;
  transition: transform 0.1s;
}
.btn-accent:hover { transform: translateY(-1px); }

.btn-secondary {
  background: rgba(42,63,95,0.6);
  color: #cfe6ff; border: 1px solid var(--steel); cursor: pointer;
  transition: background 0.2s;
}
.btn-secondary:hover { background: rgba(56,225,255,0.15); }

.example-btn {
  background: linear-gradient(180deg, rgba(42,63,95,0.5), rgba(16,32,58,0.7));
  border: 1px solid var(--steel);
  cursor: pointer;
}
.example-btn:hover { border-color: var(--cyan); box-shadow: 0 0 14px rgba(56,225,255,0.25); }

/* Slider */
.robot-slider {
  -webkit-appearance: none; appearance: none;
  height: 8px; border-radius: 6px;
  background: linear-gradient(90deg, var(--cyan), var(--orange));
  outline: none;
}
.robot-slider::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 26px; height: 26px; border-radius: 6px;
  background: #d8e8ff;
  border: 3px solid var(--cyan);
  cursor: pointer;
  box-shadow: 0 0 10px rgba(56,225,255,0.6);
}
.robot-slider::-moz-range-thumb {
  width: 22px; height: 22px; border-radius: 6px;
  background: #d8e8ff; border: 3px solid var(--cyan); cursor: pointer;
}

/* Select / input */
.robot-select {
  background: rgba(10,22,38,0.9);
  border: 1px solid var(--steel);
  color: #dbeaff;
  outline: none;
}
.robot-select:focus { border-color: var(--cyan); box-shadow: 0 0 10px rgba(56,225,255,0.3); }
.robot-select::placeholder { color: #5b7290; }

/* Tips */
.tip-card {
  background: rgba(56,225,255,0.06);
  border-left: 3px solid var(--cyan);
  border-radius: 8px;
  padding: 10px 12px;
}

.recent-card { transition: background 0.15s; }
.recent-card:hover { background: rgba(56,225,255,0.1); }

/* Blueprint frame */
.blueprint-frame {
  background:
    linear-gradient(rgba(56,225,255,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56,225,255,0.06) 1px, transparent 1px),
    #0c1c33;
  background-size: 20px 20px, 20px 20px, 100%;
  border: 2px solid var(--cyan-dim);
}

/* Animations */
.robot-bounce { animation: robotBounce 1s ease-in-out infinite; }
@keyframes robotBounce {
  0%,100% { transform: translateY(0) rotate(-4deg); }
  50% { transform: translateY(-12px) rotate(4deg); }
}

.assembly-bar {
  height: 10px; border-radius: 6px;
  background: rgba(42,63,95,0.6);
  overflow: hidden;
  border: 1px solid var(--steel);
}
.assembly-fill {
  height: 100%;
  width: 40%;
  background: linear-gradient(90deg, var(--cyan), var(--orange));
  animation: assemble 1.6s ease-in-out infinite;
  box-shadow: 0 0 12px rgba(56,225,255,0.6);
}
@keyframes assemble {
  0% { transform: translateX(-120%); }
  100% { transform: translateX(300%); }
}